Double hook



FIG. 1 is a perspective view of a double hook showing a new design;

FIG. 2 is a front view of the double hook of FIG. 1;

FIG. 3 is a side view of the double hook of FIG. 1;

FIG. 4 is a rear view of the double hook of FIG. 1; and,

FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 4.

The components of the display shown in broken lines illustrate portionsof the double hook which form no part of the claimed design.

CLAIM The ornamental design for a double hook, as shown and described.